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Phase monitor
RK 9872
- Article number: 0065075
- Type: RK9872.11 3/N AC400/230V 50/60HZ
The space saving phase monitor RK9872/800 from the Varimeter family monitors under- and... more
Product description
The space saving phase monitor RK9872/800 from the Varimeter family monitors under- and overvoltage as well as phase sequence in 3-phase systems. The response values are fixed. When connecting the measuring voltage to the inputs L1-L2-L3 and fault free system the relay switches on. When the measuring voltage is connected the unit checks a clockwise phase sequence. If this is not the case the yellow LED flashes. The output relay will not energise. After detection of under- or overvoltage on one or more phases for more the 5 sec. the relay switches off. The relay stays off for at least 2 seconds. The phase monitor measures the arithmetic mean value of the 3 phases against neutral.
Technical specifications
| Measuring range max.: | 400 V |
| Standard measuring range: | 3/N AC 400/230 V |
| 1- / 3-phase: | 3 |
| Output contacts: | 1 C/O contact |
| Width: | 17,5 mm |
| Enclosure design: | Distribution board |
| Type: | RK 9872 |
Downloads
Advantages
- Reliability monitoring of 3- or 1-phase voltage systems on:
- Undervoltage
- Overvoltage
- Phase sequence (at 3-phase voltage system) - Fast fault location
- Preventive maintenance
- Space saving
Features
- According to IEC/EN 60255-1
- Detection of under-/overvoltage and phase sequence in 3-phase voltage systems
- Without separate auxiliary voltage
- LED-Indication for operation voltage and contact position
- De-energized on trip
- With fixed response value for undervoltage
- With fixed response value for overvoltage
- Width: 17,5 mm